Winter Grow Fastbuds multi-strain

i done it again. Soil pH down in the 4's and I tried a little flushing but the truth is I never really flush well and I always try to water just enough so I dont have much run-off because I don't have a good system to deal with it. My saucers aren't big enough to hold much run-off and I have to use a shop-vac to suck it up which is the same vac I use for dry stuff and I don't like mixing it together so I just dont lol and now I'm paying for it. Next grow I plan to buy some plastic totes from wally world and cut the bottoms off and leave about 6inch of side height and use these as flood trays since actual flood trays cost a lots of $$$ just for a piece of plastic imo. This way I can fill it up and even have room for a small water pump to pump it all out. Any other suggestions on how to flush without having to buy proper equipment would be appreciated. You know when I grow in 3gal pots I dont have as much of an issue with this because by the time the soil gets toxic the plants are done and ready to harvest anyway so thats something to consider for next time as well. Other than all that everything is going fine the flowers are fatting up and filling in those spaces on the colas, they are all getting frosty and if I have some cripy leaves thats okay because I dont smoke the leaves, this is 100% personal use and I will turn half of this into wax anyway. No nutes this week